Abstract
InChaerephon plicata the definitive amnion is formed by the development of folds. The yolk-sac splanchnopleure undergoes progressive collapse and folding until it ultimately remains as a free gland-like structure with hypertrophied endodermal and mesodermal cells. It acts as an active haemophagous organ after limb-bud stage. An extensive chorio-vitelline placenta, which is formed during early gestation is progressively abolished and replaced by the chorio-allantoic placenta. Two kinds of chorio-allantoic placenta are formed—a diffuse endotheliochorial placenta, which persists until about midpregnancy, and a definitive discoid placenta which is mesometrically located, labyrinthine and haemomonochorial.
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Gopalakrishna, A., Pendharkar, Y.D. & Badwaik, N. Morphogenesis of the foetal membranes and placentation in the Indian molossid bat,Chaerephon plicata (Buchanan). Proc. Indian Acad. Sci. (Anim. Sci.) 98, 149–166 (1989). https://doi.org/10.1007/BF03179640
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DOI: https://doi.org/10.1007/BF03179640